﻿#region License
// Copyright 2010 Microsoft Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MediaWiki.MediaWikiConverter.Utilities.Scope
{
  public class SimpleScope<T> : ScopeBase<T> where T : class
  {
    private T _current;

    public SimpleScope(Func<T> creator)
      : base(creator)
    {
    }

    public SimpleScope()
    {
    }

    public override T Current
    {
      get
      {
        if (_current == null)
          _current = Create();

        return _current;
      }
      set
      {
        _current = value;
      }
    }

    public override bool HasCurrent()
    {
      return (_current != null);
    }
  }
}